✓ VERIFIED
Sep 26, 2019
Really nice kit great directions for install and ring gap. Follow the directions and you can't go wrong..
S&S CYCLE
SKU: T14-664063
S&S Cycle Super Stock 89cc Cylinder Heads - Harley Touring Big-Bore/Stroker 2006-2016
$1,995.95
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About S&S Cycle
S&S Cycle has built American V-twin performance parts in Viola, Wisconsin since 1958 — flywheels, carburetors, cams, cylinder heads and complete crate engines. When a Harley owner talks about a 124, a 128 or a 131 build, they are usually talking about S&S. Few names carry more weight with engine builders in this space.
These S&S Cycle Super Stock high-performance cylinder heads are engineered for 2006-2016 Harley engines, specifically designed to pair with stock crankcases and excel with stroker or big-bore displacements up to 110 cubic inches. The 89cc combustion chamber delivers a manageable compression ratio, making them ideally suited for touring bikes and heavier applications.
Why riders pick this
- 89cc combustion chamber for manageable compression
- Designed for stroker and big-bore engines up to 110ci
- Works with stock crankcases for easier integration
- Compatible with S&S electric or manual compression releases
When you've built your Harley Touring rig with a stroker or big-bore kit, you need cylinder heads that can keep up. These S&S Cycle Super Stock 89cc heads are purpose-built for those larger displacement engines, offering a combustion chamber volume that provides an optimal and manageable compression ratio. This design ensures your high-performance touring bike maintains reliability and driveability, even with the added stresses of increased power and heavier loads, making them a smart upgrade for serious riders.
Engineered for Big-Bore & Stroker Builds
- Features an 89cc combustion chamber for balanced compression
- Designed to work seamlessly with stock crankcases
- Ideal for stroker and big-bore engine configurations up to 110 cubic inches
- Compatible with S&S electric or manual compression releases
Critical Compatibility Considerations
Integrating these S&S Cycle Super Stock cylinder heads into your performance build requires attention to detail, especially concerning compression releases. These heads are designed for use with S&S compression releases, which are controlled by the starter relay. They are not compatible with the ECM-controlled automatic compression releases found on some stock Harley-Davidson engines. Attempting to cross-wire these systems can lead to severe damage to your engine and heads, so always ensure proper installation and component matching.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 106-3240
- Weight: 28.9 lbs
- Category: Engine Components / Heads
Common questions
Will these S&S cylinder heads work with my stock Harley automatic compression releases (ACR)?
No, these S&S Cycle cylinder heads are not compatible with stock Harley-Davidson automatic compression releases. S&S compression releases are starter-relay controlled, while HD ACRs are ECM-controlled. Attempting to wire them together will damage the heads and engine.
Are these heads suitable for a stock displacement engine?
While they can technically fit, these 89cc heads are primarily designed to pair best with stroker or big-bore displacements up to 110 cubic inches, offering optimized compression for those larger builds.
What compression releases should I use with these heads?
These S&S Cycle cylinder heads are compatible with S&S electric or manual compression releases. Be sure to use the appropriate S&S components for proper function.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | S&S Cycle |
| TYPE | Heads |
| SKU | T14-664063 |
| WEIGHT | 28.9 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.88
8 RATINGS
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✓ VERIFIED
Apr 26, 2022
Excellent service and pricing im very satisfied
✓ VERIFIED
Sep 26, 2019
Better than OEM.. can't go wrong.
✓ VERIFIED
Mar 30, 2026
Very happy with this kit
Simple, easy kit.
✓ VERIFIED
Mar 29, 2026
SMS makes great aftermarket upgrades
✓ VERIFIED
Oct 24, 2025
👍👍 For fast delivery
Parts came just like as expected. They look great! Can't wait to install these bad boys along with a few other parts.
